DAdeGroot wrote in post #7378460
Well it's only the ram, cpu was fine. I was thinking 4Gb wasn't really enough anyway as I'd run into troubles before - your just run into troubles a lot quicker with the larger raw files

That's what I was getting at. With larger RAW files, your system would be taxed in only two areas: processor or primary storage (RAM). One can argue the case for secondary storage (HDD space) too, but that's a fairly easy fix. I remembered that huge pano you posted the other day, and immediately felt you'd have a much harder time doing the same thing with RAW files much larger. A slower processor will do things slower, but an insufficient amount of memory might stop the project in its tracks completely. Not sure if you're using 2x2GB sticks, but a 4x1GB configuration would be annoying as you'd have to buy all-new RAM.
Last time I tried an 8GB configuration, I also had stability issues with my mobo. Intel said my particular mobo's northbridge might have been the blame. Thankfully they've finally followed AMD's footsteps in moving the memory controller in-die with Nahalem, so I suppose I won't run into that particular problem again when I do my upcoming rebuild.